Garden care · 4 min read
Why does patio algae keep coming back?
The honest answer involves shade, moisture, airflow and what sits around the paving.
Algae returns when the conditions that suit it return. A good clean resets the surface, but the surrounding microclimate still has a say.
Moisture is the main character
Shaded areas, slow drainage, overhanging planting and limited airflow can keep paving damp for longer, creating favourable conditions for regrowth.
Material changes the picture
Texture and porosity affect how a surface holds moisture and organic material. That is one reason the cleaning method should be matched to the paving.
Care beats surprise
Appropriate post-treatment and a sensible seasonal rhythm can help manage recurrence. They cannot permanently change the weather or the location of the patio.
ONE MORE THING
Can algae be stopped forever?
No responsible treatment can promise that. Conditions, maintenance and the surface itself all influence regrowth.